Apparatus for forming stays and for connecting struts.



No. 804,696. PATENTED NOV. 14, 1905. F. W. WINTERHOFP.

APPARATUS POR FORMING STAYS AND FOR GONNEGTING STRUTS.

APPLICATION FILED Nov. 4, 1904.

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F. W. WINTERHOFF. APPARATUS FOR FORMING STAYS AND FOR CONNECTING STRUTS.

APPLICATION FILED NOV. 4, 1904'l 2 SHEETS-SHEET 2,

APPARATUS FOR FORMING STAYS AND FOR CONNECTING STRUTS.

Specification of Letters Patent.

Patented Nov. 14, 1905.

Application filed November 4,1904. Serial No. 231,369.

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Be it known that 1, FRIEDRICH VILHELM WiX'rni-:i-IOFF, eng'ineer, asubject of the German Emperor, and a resident of 49 Kronprinzenstrasse.Dsseldorf on -the Rhine, ('T'ermany. have invented certain new anduseful improvements in Apparatus 'for Forming Stays and for ConnectingStruts, of which the following' is a specification.

The invention relates to struts which may be used for the purpose ofadjusting the leng'th of and of stretching wires, chains, wire ropes,tie-rods, and stays or of supporting props of trenches and the like; andits object is to provide means for securing the struts and their workingmechanism against undue strain.

The improvement essentially comprises a tube-like member by which isinclosed the working mechanism and a special formation of the ends orheads of the struts.

The acconipanying drawings show, by way of example, various suitableconstructional forms of a strut embodying the invention.

Figures l and 2 are similar constructions of a strut for use with wires,chains, wire ropes, and the like in longitudinal section. Fig'. 3 showsa strut adapted to support props of trenches in longitudinal section.Fig. 4 is a sectional view of the end of a strut of similar constructionto Fig'. 3, having a separate prolongation-piece attached to it. Fig. 5is a modified constructional form of the strut shown in Fig. 3. Fig'. 6is a view of two struts having' special iron pieces rigidly fixed totheir heads. Figs. T and 8 ai'e an end view and a longitudinal section,respectively, of a strut having special iron pieces movably anddetachably fixed to their heads. Fig's. 9 and lO are a view andlongitudinal section, respectively, of a strut used as a lifting-jack.

The construction shown in Fig's. l and 2 is particularly applicable tostruts for tie-rods or stays in iron structures, though it may be usedas well for stretching chains, wires, ropes, and the like.

According to Fig'. l the strut comprises one right and one left handscrew-threaded bolt c, of which one end terminates in a hook or eye (l.while the other forms the end of a tie-rod e. Each of these boltscarries a likewise screwthreaded nut Z), having aninternally-screwthreaded flange, the two flanges being rigidly connectedtogether by a tube (t. For the purpose of effecting the actuation-thatis, the rotation-of the tube a, a transverse hole f is bored through itswalls, in which a detachable pin may be inserted when it is desired toturn the tube a, upon which operation the nuts turn also, thus drawing'the bolts c either apart or together.

In Fig. Q a modification in the arrangement of the nuts is shown.Instead of being' rigidly screwed upon the ends of the tube u the nutsscrew in the bore of it or are simply fitted in and secured by mean ofpins g to the tube a.

The construction shown in Figs. 3 to 8 may be preferably employed forstruts serving as a support for props of trenches and the like.

The strut shown in Fig. 3 comprises the same arrangement of the tube fryand nuts I) as the construction shown in Fig. 1. Vln the nuts Z) screwright and left hand externally-screwthreaded tubes c, which at theiropposite ends to their attachment are closed by Stoppers /l or the liketo prevent earth or gravel from entering' the interior of the tube t andtubes c and provided with rigidly-lixed flanges t, which abut againstthe props of the trenches and are prevented from slipping by pointedpins n or the like. 'lo presei've the outer portions of the nuts 71 andtubes c from dirt and rust, a cylindrical guide lnl is attached to eachiiange 71 which serves as a guard for the working' mechanism and inwhich the nuts are adapted to slide to and fro in plunger-like fashionthrough the medium of shoulders l, projecting' from the nuts In order toactuate the working' mechanism that is to turn the tube a, the latterinstead of being' simply perforated by a transverse hole, as at f inFig. l, carries in the middle a transversely-inserted pipe 7i: for thepurpose of preventing' dirt and gravel from entering' the interior ofthe tube a.

For the purpose of supporting props of very wide dimension with thestrut shown in Fig. 3 prolongated pieces p, carrying also 'flanges t,with pointed pins n, may be employed, in which case the stopper zi isdispensed with for allowing' the piece p to be inserted in the holeformerly closed by the stopper. To prevent the prolongation-piece p fromturning', projections 1] are provided for catching' in correspondingnotches o, disposed in the flange this construction being shown in Fig'.a.

Preferably, as shown in Fig'. 5, only one tube c may be designed toscrew into its nut 7;, while the other is slidably inserted in its nutI), in which case the latter serves as an ordinary guide, while its tubeis provided with ICO IOS

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transverse holes r, in one of which a bolt s may be inserted, abuttingwhen the strut is used against an intermediary ring t.

Fig. 6 shows two struts for mounting special iron bars v on walls. Forthis purpose the flanges 7L are dispensed with and replaced bycorrespondingly-figured iron heads a, which catch into or over the ironbars, thus preventing them from slipping.

If necessary, ianges /L may be constructed, as shown in Fig. 8, movably,so as to fit in walls of any inclination, this being accomplished bygiving the iiange hemispheric shape and adapting it to slide with itsouter contours along' a fixed correspondingly-shaped head, the headbeing provided for this purpose with-a notch 10,through which isinserted a screw-bolt a?, attaching the loose ange tothe tixed headthrough themedium of a counter-disk y.

The employment of the strut as a liftingjack is shown in Figs. 9 and l0.As soon as the jack comes under load the two oppositelyscrew-threadedtubes c and a are, upon the nut Z) being turned, screwed apart ortogether, respectively, the tube a screwing into the nut which isrigidly fixed to the tube a', while the latter screws into the nut In',which is rigidly fixed to the base-tube d2, the two ends of the strutsterminating each in a xed flange It.

Having thus fully described my invention, what I desire to secure byLetters -Patent isl. In an apparatus of the character described, thecombination of a tube, a pair of oppositely-threa'ded nuts detachablysecured on the ends of said tube, and a pair of oppositely-threadedbolts projecting into said tube and having their threads in engagementwith the threads of the nuts.

2. In an apparatus of the character described, the combination of atube, a pair of oppositely-threaded nuts each provided with a liangescrewed into the exterior of the ends of said tube, and a pair ofoppositely-th'readed bolts projecting into said tube and having theirthreads in engagement with the threads of the nuts.

3. In an apparatus of the character described, the combination of atube, a pair of oppositely-threaded nuts each provided with a flangescrewed into the exterior ot' the ends of said tube, said nuts beingprovided with shoulders at their ends opposite the anges, a pair ofoppositely-threaded bolts projecting into said tube and having theirthreads in engagement with the threads of the nuts, and cylindricalguides connected to said bolts for sliding engagement with the shouldersof the nuts.

In witness whereof I have hereunto set my hand in presence oi' twosubscribing witnesses.

FRIEDRICH WILHELM WINTERHOFF.

Witnesses:

PETER LIEBER, WILLIAM EssENWEIN.

